CVE-2022-49016

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net: mdiobus: fix unbalanced node reference count<br /> <br /> I got the following report while doing device(mscc-miim) load test<br /> with CONFIG_OF_UNITTEST and CONFIG_OF_DYNAMIC enabled:<br /> <br /> OF: ERROR: memory leak, expected refcount 1 instead of 2,<br /> of_node_get()/of_node_put() unbalanced - destroy cset entry:<br /> attach overlay node /spi/soc@0/mdio@7107009c/ethernet-phy@0<br /> <br /> If the &amp;#39;fwnode&amp;#39; is not an acpi node, the refcount is get in<br /> fwnode_mdiobus_phy_device_register(), but it has never been<br /> put when the device is freed in the normal path. So call<br /> fwnode_handle_put() in phy_device_release() to avoid leak.<br /> <br /> If it&amp;#39;s an acpi node, it has never been get, but it&amp;#39;s put<br /> in the error path, so call fwnode_handle_get() before<br /> phy_device_register() to keep get/put operation balanced.